I have trouble with the OS X time machine. It fails to complete the backup. I had the impression that I got the error message for a couple of days now, but when I checked, it said that the last backup was done in august.
So that seemed weird. My disk was filled to 95%, so I deleted some stuff - now I have 135 gigs free - that should be more than enough for a backup. Still it doesn't work. The error message I get says (translated from german)
"Time Machine couldn't finish the backup because of network problems - please check that the backup HDD is powered on and is in the same network, then try again".

I already installed the lastest WD firmware and also re-installed the addons (MyBook clone). That didn't help either. I also checked the OSX console. Initiating the backup only creates one entry, namely "QUICKCHECK ONLY, FILESYSTEM CLEAN".
I don't see any network problems when I'm trying to access my regular data share. Has anybody experienced the same problem? Any hints on how to fix it?